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Title:
ILLUMINATING DEVICE AND LIQUID CRYSTAL DISPLAY
Document Type and Number:
WIPO Patent Application WO/2008/047496
Kind Code:
A1
Abstract:
Disclosed is an illuminating device (1) comprising a hot cathode fluorescent lamp (2) having a filament electrode (7) emitting thermoelectrons, an optical sensor (3) for sensing electromagnetic waves emitted from the filament electrode (7), and a driving circuit (5) for controlling operation of the hot cathode fluorescent lamp (2) according to the sensed results of the optical sensor (3). By having such a constitution, there can be obtained an illuminating device wherein an abnormality of the hot cathode fluorescent lamp can be sensed promptly.

Inventors:
FURUSAWA YASUHIRO
Application Number:
PCT/JP2007/061422
Publication Date:
April 24, 2008
Filing Date:
June 06, 2007
Export Citation:
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Assignee:
SHARP KK (JP)
FURUSAWA YASUHIRO
International Classes:
H05B41/24; F21V23/00
Foreign References:
JPH0689787A1994-03-29
JPH0667175A1994-03-11
JPH05174983A1993-07-13
JPH11238591A1999-08-31
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (2-6 Tenjinbashi 2-chome Kita,Kita-k, Osaka-shi Osaka 41, JP)
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